Both work much better than the factory guides. Band Saw Guide Upgrade Kits Carter Products offers band saw guide conversion (retrofit) kits for many popular saws. I was surprised, however, to find that the two Allen wrenches needed to install and make adjustments to the bearings were not included in the kit. I have Cool Blocks on my small band saw that is running a 1/8" - 1/4" blade most of the time, and the Carter bearings on my larger band saw that typically has a 1/2" - 3/4" blade. Editor test-drive: I spent a mere 15 minutes installing the Carter Conversion Kit on my 14" Jet bandsaw. 1. Carter Conversion Kit. My older 18" Jet Bandsaw has European style Guides that I'd like to replace, but I'm afraid to buy expensive Carter Guides only to find out bearings don't work so well with sawdust from green wood. For our purposes, the specific style of blade guide and number of wheels are irrelevant. About a year ago, I bought the Carter guides & tires for my 14" Delta BS. The big guides from Ted (right-most above) have nice knobs on either side, plus a locking ring. The cheap blade guides from my 14" bandsaw were the easiest to adjust. These kits typically include the upper and lower guides, upper and lower mounting brackets, studs, screws, and (if appropriate) a guard adapter bracket. Prior to installing these 2 Carter products, the saw worked well, but exhibited too much drift when resawing & more often than not, left a rough cut. There is a whole quality spectrum when it comes to bandsaw blade guides. The basic guide system comes with a short blade guard intended for a saw without a riser block. Three wheels or two, setup works the same. I am considering upgrading my Jet 14” bandsaw by installing the Carter ball bearing blade guides. For sawing 3/4" or thinner stock & gentle curves it worked OK, but not great. If you cut a lot of green wood then please report back here about your experience. But don’t let any of this distract you. I have a couple questions for those who already own these guides. A lot of tabletop band saws increase their throat depth by using three wheels instead of two. Saw a demonstration @ wood show. The blocks tend to work better on narrower blades. It replaced not only the guides, but also my saw's entire upper and lower blade-guide assembly. But getting the guides to just touch the blade and rub lightly was fiddly to get right, so also kind of annoying. Application: - Bandsaw Guide conversion kits replace the lower and upper factory band saw blade guide assemblies with a precision guide assembly. - Bandsaw guide conversion (retrofit) kits typically include the upper and lower guides, upper and lower mounting brackets, studs, screws, and (if appropriate) a guard adapter bracket. So large adjustments are quite nice.